Well, I've always wondered which OS was best on the average computer. Ever since 2001, XP ruled over most OS's with it's lightweight core.Tests has been performed on a computer with: Intel dual-core E5200 CPU, 2GB of RAM and an ATI Radeon HD4550 graphics card and 500gb harddrive.First Comparison: BOOT TIMEResults:XP: 3.5 / 5Vista: 3 / 5Windows 7: 4.5 / 5Second Comparison: GamingXP has been really compatible with mostly all games. Major games that are released are also written for XPresult:ScoresXP: 4 / 5Vista: 3 / 5Windows 7: 4 / 5Looks like windows 7 wins